LLOYD'S REGISTER OF SHIPPING 93 his ship be withdrawn from class when no survey is overdue and there are no known defects, particulars of the class are removed and a note is inserted in the Register and Supplements. When the rules as regards surveys on the hull, machinery, or equipment have not been complied with, the class may be expunged by the Committee, and a note to this effect indicating the reason and date of the decision is made in the Register and Supplements. The class may also be expunged when a ship is reported to have serious defects which the owners take no steps efficiently to repair, and similar action to record this fact is taken. When a ship sails with less freeboard than that approved, or where the freeboard marks axe placed higher than the position assigned by the Committee, her class is liable to be expunged from the Register. In the case of a ship being sunk, wrecked, or lost, the class is deleted and a notation as to the cause of the casualty is inserted against her name. COLUMN (6) This shows, inter alia, the number of screwshafts (if more than one), the type of propulsion (e.g. steam, motor, diesel-electric), and type of ship (tanker, tug, trawler, etc.). The shipbuilders, together with date and place of build, are also stated, and a note is given of any special features of construction and design or subsequent alterations, such as the employment of electric welding in construction, lengthen- ing, or strengthening for navigation in ice. The number of decks is also given and the overall length, extreme breadth, and summer draught. The notation "NS" (no sparring), also appears in this column against some vessels classed with the Society. This term shows that the vessel is not fitted with cargo battens, and therefore the liability for cargo to become damaged by contact with the ship's sides is greater. The point is of interest to sMppers.